package thread;

public class SyncDemo4 {
    public static void main(String[] args) {
        StringBuilder sb=new StringBuilder();
        //StringBuffer sb=new StringBuffer();
        Thread t1=new Thread(){
            public void run()
            {
                for(int i=0;i<1000;i++)
                {
                    sb.append("a");
                }
            }
        };
        Thread t2=new Thread(){
            public void run()
            {
                for(int i=0;i<1000;i++)
                {
                    sb.append("1");
                }
            }
        };
        t1.start();
        t2.start();

        try {
            Thread.sleep(50);
        } catch (InterruptedException e) {

        }
        System.out.println(sb.length());
        System.out.println(sb);
    }
}
